Hi Larry

>This has got me bugged.
>I have searched high and low and I can't find any reference to query performance being hindered using varchar vs. char.

I think we may be talking at cross purposes. The original question was in relation to Primary Keys, not query performance.

>Did you see your performance hits in yoru queries or your transactions?

I have never tried to do this for queries - and I can't really see why it would make any difference either (other than, as you say, to things like index maintenance that are involved when transactions occur on the table).